Date of issue 07/02 Bulletin Number XT419-02 Page 1 of 30
DATEXT419-0207/02
SERVICE TECHNICAL BULLETIN
Passive Anti -Theft System (PATS) –
Diagnostic Flowcharts
2002 MY-ON
X-TYPE
C00001-ON
MODEL
VIN
X-TYPE
Issue:
This bulletin provides diagnostic information for the Passive Anti-Theft System.
Action:
Refer to the following information when diagnosing PATS on a 2002 MY-ON X-TYPEvehicle.
DIAGNOSTIC FLOWCHARTS
· P1260 - Security input (Page 2)
· Passive Anti-Theft System (To be used to interpret the type of failure)(Pages 3 and 4)
PATS Customer fault code flowcharts.
· B1681 - fault code 11 (Pages 5, 6, 7 and 8)
· B1600 - fault code 13 (Pages 9 and 10)
· B1602 - fault code 14 (Pages 11, 12, 13 and 14)
· B1601 - fault code 15 (Pages 15, 16 and 17)
· U2511/U1900 - fault code 16 (Page 18)
PATS Non-Customer fault code flowcharts.
· B1213 - fault code 21 (Pages 19 and 20)
· B2141 - fault code 22 (Pages 21 and 22)
· U2510 - fault code 23 (Pages 23 and 24)
ADDITIONAL INFORMATION
· Passive Anti-Theft System Overview (Page 25)
· Engine Control Module (ECM) PATS functionality (Page 26)
· Fault code reading (from PATS LED) (Page 27)
· DTC Desciptions (Page 28)
· Generic Connector Inspection (Page 29)
· Generic Harness Check (Page 30)
P1260 Security Input
Use the Worldwide Diagnostic System (WDS) to interrogate the EngineControl Module (ECM) for DiagnosticTrouble Codes (DTC)
Was a faultidentified via PATS
prove out?
NO
Go to the associatedflowchart YES
If P1260 is logged, check that the Passive Anti-Theft System(PATS) prove-out is not reporting any faults via the Light
Emitting Diode (LED)
See Additional InformationFault Code Reading
Was a fault foundand rectified?
YES
NO
END
Contact Technical Hotline for further assistance
Using WDS.Select Module Communications Network from the Content Model menu,
then CAN Network.Check the Network Integrity
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Passive Anti-Theft System
Faults with the Passive Anti-Theft System (PATS)are reported by the Instrument Cluster as
Diagnostic Trouble Codes (DTCs) and Fault Codesvia the Light Emitting Diode (LED)
If possible, ensure all customer keys are present,before proceeding
Switch the ignition 'ON'
Did the PATS LED illuminate when
the ignition was switched'ON'?
Use the WDS toinvestigate LED failure
NO
YES
A
Refer to the ElectricalGuide on JTIS
Is theInstrument Cluster Oil, Battery
and Message CenterIlluminated?
Check batterycondition and power
supplies/ignitioncircuits to Instrument
Cluster
Wasa fault found and
rectified?
YESYES
NO
NO
END
Contact Technical Hotline for further assistance
Date of issue 07/02 z Technical Bulletin XT419-02 Page 3 of 30
A
Does the PATS LED flash whenthe ignition is switched
'ON'?
YESRefer to the relevant flowchart
PATS customer fault codes.B1681 - fault code 11B1600 - fault code 13B1602 - fault code 14B1601 - fault code 15
U2511/U1900 - fault code 16
Does the PATS LED extinguish
after 3 seconds?
NO
YESNo faults indicated inprove out
NO
W ait for 60 seconds then read thefault code
Refer to the relevant flowchart
PATS 'Non' Customer faultcodes
B1213 - fault code 21B2141 - fault code 22U2510 - fault code 23
W ait for 60 secondsthen read the fault
code
See Additional Information.PATS Fault Code Reading
See Additional Information.PATS Fault Code Reading
Passive Anti-Theft System Cont.
Date of issue 07/02 z Technical Bulletin XT419-02 Page 4 of 30
Diagnostic Trouble Code B1681Fault Code 11
Was thereading asexpected?
Disconnect PATS Transceiver electricalconnector IP015 and carry out aGeneric Connector Inspection
With the ignition 'ON'using a Digital Multi Meter (DMM) check for voltage at electrical
connector IP015 pin 001. Expected reading > 9 volts
YES
NO
Was a fault foundand rectified?
END YES NO
When inspecting the connector, payparticular attention to the wire
clamp, ensuring it is clipped fullyhome. Also ensure the wires
protruding through the connector aretrimmed correctly and not shorting
A
Visually inspect fitment of Passive Anti-Theft System(PATS) Transceiver
and electrical connector
Disconnect Instrument Cluster electricalconnector IP010
and carry out Generic Connector Inspection
See Additional InformationGeneric Connector
InspectionSee AdditionalInformation
Generic Harness Check
Contact Technical Hotline for further assistance
See Additional InformationGeneric Connector
Inspection
Carry out a Generic Harness Check between PATS Transceiverelectrical connector IP015 pin 001 and
Instrument Cluster electrical connector IP010 pin 006(Green wire)
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A
Check for continuity between the PATS Transceiver electricalconnector IP015 pin 002 and the Instrument Cluster electrical
connector IP010 pin 005 (Black wire)
Was a fault foundand rectified?
END YES NO
See Additional InformationGeneric Harness Check
Disconnect Instrument Cluster electrical connectorIP010
and carry out a Generic Connector Inspection
See Additional InformationGeneric Connector
InspectionNO
With the ignition 'ON'using a DMM
check for a ground supply at PATS Transceiverelectrical connector IP015 pin 002
B YES Was the readingas expected?
Contact Technical Hotline for further assistance
See AdditionalInformation
Generic Harness Check
B 1681 Cont.
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B
With the ignition 'ON'using a DMM check for voltage at PATS Transceiver electrical
connector IP015 pin 003. Expected reading > 9 volts
YES
NO
Check for continuity between PATS Transceiver electrical connectorIP015 pin 003
and Instrument Cluster electrical connector IP010 pin 003(White and green wire)
Disconnect Instrument Cluster electrical connectorIP010
and carry out a Generic Connector Inspection
See Additional InformationGeneric Harness Check
Was a fault foundand rectified?
END YESContact Technical
Hotline for further assistanceNO
C
See Additional InformationGeneric Connector
Inspection
Was thereading asexpected?
B 1681 Cont.
Date of issue 07/02 z Technical Bulletin XT419-02 Page 7 of 30
C
Check for continuity between PATS Transceiver electricalconnector IP015 pin 004
and Instrument Cluster electrical connector IP010 pin 004(Orange wire)
YESEND W as a fault foundand rectified?
Disconnect Instrument Cluster electrical connectorIP010
and carry out a Generic Connector Inspection
See Additional InformationGeneric Harness Check
Replace faulty PATS Transceiver
NO
See Additional InformationGeneric Connector
Inspection
B 1681 Cont.
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Insert another key into ignition andswitch the ignition 'ON'
Diagnostic Trouble Code B1600 Fault Code 13
Switch the ignition 'OFF'and remove the key from ignition
Is thePassive Anti-Theft System
(PATS) LED flashing?
NO
YES
Does the PATS LED
extinguish after3 seconds?
YES
NO
Replace the originalignition key
LED on constantly for 60seconds
Read the 'Non' Customer fault codeand follow the relevant flowchart
A
Note: Ensuremore thanone key isavailable
Ensure all availableignition keys are
clear of fault codeswithin the PATS
prove-out, before thevehicle is returned to
the customer
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Isfault code 13 still
present?YES
NO
Replace faulty PATSTransceiver
W ait for 60 seconds
Follow the relevant flowchart
A
Ensure all availableignition keys are
clear of fault codeswithin the PATS
prove out, before thevehicle is returned to
the customer
B1600 Cont.
Areany other fault
codes present?
YES
Replace the originalignition key
NO
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Areany non-Jaguar keysattached to the key
ring?
Diagnostic Trouble Code B1602Fault Code 14
Is the Passive Anti-Theft
System (PATS) LEDflashing?
NO
YES
Does the PATS LED
extinguish after3 seconds?
YES
NO
LED on constantly for 60seconds
Read the 'Non' customer fault codeand follow the relevant flowchart
A
YES
Separate Jaguar keys from key ring
Switch the ignition 'ON'
Notify customer thatattachments on key ring are
interfering with key transponder
NO B
Ensure all availableignition keys are clear offault codes within PATS
prove-out, before returningthe vehicle to the
customer
Note: Ensurem ore thanone key isavailable
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Is thefault code 14 still
present?YES
W ait for 60 seconds
If other fault codes are present,follow the relevant flowchart
A
Insert another key into ignition,switch the ignition 'ON'
Is the PATS LEDflashing?
NO
Does the PATS LED
extinguish after3 seconds?
NO
LED on constantly for 60 seconds
Read the 'Non' customer fault codeand follow the relevant flowchart
YES
Replace original ignition key
Is thefault code 14 still
present?
Replace faulty PATS Transceiver
YES
YES
W ait for 60seconds
NO
B1602 Cont.
Ensure all availableignition keys are clear offault codes within PATS
prove-out, before returningthe vehicle to the
customer
As the 2nd key has indicated anotherfault, rectify that fault first and then
recheck original key
NO
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B
Insert another key into ignition,switch the ignition 'ON'
Is the PATS LEDflashing?
NO
Does the PATS LED
extinguish after3 seconds?
NO
LED on constantly for 60seconds
Read the 'Non' customer fault codeand follow the relevant flowchart
YESReplace original ignition key
YESC
B1602 Cont.
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NOIs the
fault code 14 stillpresent?
Replace faulty PATS Transceiver
YES
YES
W ait for 60 seconds
If other fault codes are present,follow the relevant flowchart
C
Ensure all the availablekeys are free from faultcodes within the PATS
prove-out, beforereturning the vehicle to
the customer
B1602 Cont.
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Diagnostic Trouble Code B1601Fault Code 15
Have the keytransponders beenre-programmed to
the vehicle?
NO
Insert another key into ignition,and switch the ignition 'ON'
Switch the ignition 'OFF'and remove the key
Is thePassive Anti-Theft
System (PATS) LEDflashing?
NO
Does the PATS LED
extinguish after3 seconds?
YES
NO
Replace the originalignition key
LED on constantly for 60 seconds
Read the 'Non' customer fault codeand follow the relevant flowchart
B YES
A YES
Note: Ensurem ore thanone key isavailable
Ensure all availableignition keys are clear
from fault codeswithin PATS prove-out, before returning
the vehicle to thecustomer
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A
Switch ignition 'ON'
Is the PATS LEDflashing?
NO
Does the PATS LED
extinguish after3 seconds?
YES
NO
LED on constantly for 60seconds
Read the 'Non' customer fault codeand follow the relevant flowchart
B YES
Using W orldwide Diagnostic System (W DS).Select Vehicle Configuration tab, Set-up and Configuration,
Securitythen program new transponders
Re-program all available keys
Ensure all availableignition keys are clear offault codes within PATS
prove-out, beforereturning the vehicle to
the customer
END
B1601 Cont.
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Is thefault code 15 still
present?YES
NO
Wait for 60 seconds
B
Contact Technical Hotline for further assistance
If other fault codes arepresent, follow the relevant
flowchart
Ensure all availableignition keys are clearfrom fault codes within
PATS prove-out, beforereturning the vehicle to
the customer
B1601 Cont.
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Diagnostic Trouble Code U2511/U1900Fault Code 16
Was a fault foundand rectified?
YES
NO
END
Contact Technical Hotline for further assistance
Investigate power and groundsupplies to the Engine Control Module
NO
Refer to the X-TYPEElectrical Guide
Was a fault foundand rectified?
YESEND
2.5/3.0L Power - EN016 pin 022 EN016 pin 023 EN016 pin 024Ground - EN016 pin 004 EN016 pin 005
Using the Worldwide Diagnostic System (WDS).Select Module Communications Network from the Content Model menu, then the CAN
networkCheck the network integrity
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Diagnostic Trouble Code B1213Fault Code 21
Ensure all keys programmed to thevehicle are available
Switch the ignition 'ON'
Is the Passive Anti-Theft
System (PATS) LEDflashing?
W ait for 60 seconds
YES
Does the PATS LED
extinguish after3 seconds?
YES
NO
NO A
Using the W orldwide Diagnostic System (W DS). Select Vehicle Configuration tab,Set-up and Configuration,
Securitythen program new transponders
Re-program all keys available to the vehicle
If other fault codes are present,follow the relevant flowchart
END
Ensure all availableignition keys are clear
of fault codes within thePATS prove-out, beforereturning the vehicle to
the customer
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Is thefault code 21 still
present?YES
NO
A
LED on constantly for 60 seconds
Contact Technical Hotline for further assistance
If other fault codes are present,follow the relevant flowchart
Ensure all availableignition keys are
clear of fault codeswithin PATS prove-out, before returning
the vehicle to thecustomer
B1213 Cont.
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Diagnostic Trouble Code B2141Fault Code 22
Run the application
Diagnostic Trouble Code (DTC) B2141 willonly occur following an Instrument Cluster
replacement
Switch the ignition 'ON'
NO
YES
Does the PATS LED
extinguish after3 seconds?
YES
NO
W ait for 60 seconds
A
Using the W orldwide Diagnostic System (W DS).Select Vehicle Configuration, Set-up and Configuration
then Immobilisation Set-up
If other fault codes are present,follow the relevant flowchart
Ensure all availableignition keys are
clear of fault codeswithin PATS prove-out, before returning
the vehicle to thecustomer
END
Is the Passive Anti-Theft
System (PATS) LEDflashing?
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Is thefault code 22 still
present?
YES
NO
LED on solid for 60seconds
A
Was a fault foundand rectified?
YES
NO
END
Contact Technical Hotline for further assistance
Using the WDS.Select Module Communications Network, CAN Network
then check Network Integrity
Ensure all availableignition keys are clearfrom fault codes withinthe PATS prove-out,before returning the
vehicle to the customer
If other fault codes are present,follow the relevant flowchart
B2141 Cont.
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Diagnostic Trouble Code U2510Fault Code 23
Run the application
Diagnostic Trouble Code (DTC) U2510 willonly occur following replacement of Engine
Control Module (ECM)
Is the Passive Anti-Theft
System (PATS) LEDflashing?
NO
YES
Does the PATS LED
extinguish after3 seconds?
NO
Switch the ignition 'ON'
W ait for 60 seconds
A
Using the W orldwide Diagnostic System (W DS).Select Vehicle Configuration, Set-up and Configuration
then Immobilisation Set-up
If other fault codes are present,follow the relevant flowchart
Ensure all availableignition keys are
clear of fault codeswithin PATS prove-out, before returning
the vehicle to thecustomer
END
YES
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Is thefault code 23 still
present?
YES
NO
A
Was a fault foundand rectified?
YES
NO
END
Contact Technical Hotline for further assistance
LED on constantly for 60 seconds
If other fault codes are present,follow the relevant flowchart
Ensure all availableignition keys are clearfrom fault codes withinthe PATS prove-out,before returning the
vehicle to the customer
Using the WDS.Select Module Communications Network, CAN Network
then Check Network Integrity
U2510 Cont.
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Additional Information
Passive Anti-Theft System Overview The Passive Anti Theft System (PATS) function is split between the instrument cluster and the Engine Control Module (ECM). In order for the vehicle engine to crank and start the instrument cluster must have read a valid key and the correct information flow must have occurred between the instrument cluster and the ECM: (see Fig. 1)
Determine key status Status OK ?Key Status
Transmit challengecode
Receive challenge code& transmit response 4 Byte Challenge Code
Comparison4 Byte Response Code
ECM ID
ResponseOK?
Enable fuel injectionEnable ignition coils
Enable starter controlSystem Status Message
Disable fuel injectionDisable ignition coils
Disable starter control
No
Yes
No
Yes
Instrument ClusterCAN Messages
Engine Control M odule
TerminatePATS msg.
Fig. 1
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ECM PATS Functionality When a key is inserted in the ignition barrel, a hardwired input is supplied to the instrument cluster. This triggers the instrument cluster to read the PATS key code stored in the key and compare it with one that has been previously stored. If the ignition key is subsequently turned to the 'RUN/START' position the result of this comparison is transmitted to the ECM via the Controller Area Network (CAN). Assuming the key status message received from the instrument cluster is OK, the ECM will respond with a challenge code. The instrument cluster will after encryption send a response code, if this response code matches one that the ECM has calculated the fuel injectors, ignition coils, fuel pump drive and starter will be enabled. The ECM will disable the fuel injectors, ignition coils, fuel pump drive and starter if any of the following conditions apply: 1. A theft signal has been received from the instrument cluster, i.e. the key code has not been
authenticated. 2. A challenge code has been transmitted to the instrument cluster but no response code has been
received. 3. A challenge code has been transmitted to the instrument cluster and an incorrect response
received. The ECM will log DTC P1260 for any of the following reasons: 1. PATS Sequence Time Out. This means that the PATS exchange has started but the two second
timer has expired prior to receiving the Enable / Disable Engine status. 2. Identification transfer challenge error. This occurs following an ID transfer (Part replacement), if
the result of the challenge is incorrect. 3. Challenge response errors. This occurs if the result of the challenge is incorrect. The challenge is
performed on every key 'ON' cycle. 4. Invalid key data received. This occurs if the ECM receives incorrect Key Status data.
System Diagnostics
The best method to confirm the correct operation of PATS is to check the light emitting diode (LED). The LED should illuminate constantly for 3 seconds when the key is turned to Ignition 'RUN/START' position and then extinguish. This validates all PATS functions (PATS Prove-out) i.e. the key transponder matches a key code stored, the challenge/response sequence between the instrument cluster and ECM was successful resulting in the ECM being enabled.
Engine cranks but will not start
If the engine is cranking it means that the ECM is enabled with respect to PATS. If PATS was disabled the ECM would not engage the starter. This could be confirmed by verifying the PATS LED prove-out (illuminated solid for 3 seconds) or by reading Diagnostic Trouble Codes (DTCs) from the instrument cluster and ECM.
Date of issue 07/02 z Technical Bulletin XT419-02 Page 26 of 30
Fault Code Reading (from PATS LED) When a PATS fault is apparent, the instrument cluster will store a DTC and indicate this to the customer by illuminating the LED in the following manner. The LED will be illuminated for 60 seconds (flashing for customer fault codes, continuous for non-customer fault codes); the LED will then be extinguished for 2.5 seconds. The first digit of the fault code will then be flashed. The total LED 'on/off' time per single flash will be one second, this being repeated for the relevant number of times to count the first digit. The LED is then off for a further 1.5 seconds before the second digit of the fault code is flashed, again the total 'on/off' time per single flash will be one second with the number of repeats being the second digit (see Fig. 2 below). The fault code flash routine will be repeated up to 10 times. The indication will stop immediately if the ignition is turned to 'OFF' at any time during the fault indication sequence. (Note: Only the highest priority fault code will be flashed) Normal PATS operations are complete within 400 milliseconds of the ignition switch transition from 'OFF' to 'RUN/START'; worst case for ECM communication problems will be less than two seconds. If PATS is not complete during the two seconds, the ECM will terminate PATS and await the next Ignition 'RUN/START' event. • Example (see Fig. 2); fault code 21 (all times in seconds from left hand side 2.5s, 1s, 1s, 1.5s, 1s,
2.5s, 1s, 1s, 1.5s and 1s)
Fig. 2
on off
2.5s 1s 1s 1.5s 1s 2.5s 1s 1s 1.5s 1s
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DTC Descriptions Customer codes P1260 Security input malfunction. B1681 Transceiver communications error. B1600 Key transponder signal not received by the transceiver. B1602 Key transponder communications error. B1601 Key transponder code not stored in memory. U2511/U1900 Instrument Cluster to engine control module (ECM) Controller Area Network (CAN) communication error. Non-customer codes B1213 Minimum key programming not achieved. B2141 No ECM identification stored in the Instrument Cluster. U2510 Mismatch with ECM identification stored in the Instrument Cluster and the ECM memory.
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Generic Connector Inspection Electrical failures can be caused by problems with the connectors and their pins. Below are a number of points that may aid in investigation.
Backed-out Pins Inspection of the connector; look for signs that the pin has backed-out. If a seal is fitted to the pin it may be protruding further out the back of the connector. If a pin has backed-out of the cavity in the connector, there is a possibility that it has been forced out when the connector was mated. Make sure that the pins are in line when the two halves of the connector are mated.
Bent Pins Disconnect the two halves of the connector and visually inspect the pins. If a pin is bent over there is a possibility of a short from pin to pin. Pins can easily be bent over when the connector is mated. Check to ensure the pins within the connector are not knocked out of alignment before the two halves of the connector are mated.
Water ingress/fluid ingress Disconnect the connector and inspect for signs of water ingress, corrosion may have occurred. If water or any other fluid is visible this may cause a bad connection or even short circuit to the other pins within the connector. Examine the connector seals for any damage and to ensure that the seals are fitted correctly. Ensure that the two halves of the connector latch together securely.
Probing Ensure when probing a pin that the correct probe is used and excessive force is not used as this may weaken the locating clip and allow the pin to work loose. Care must be taken when probing female pins as the pin can easily be splayed if probed with the incorrect adaptor or the wrong tool. This would then have the potential to cause a bad connection between the two mating halves. Always use the Worldwide Diagnostic System probe kit when probing pins within a connector. (Jaguar probe adaptor kit part number. 3548-1358-00.) Insertion force Insertion force is imperative to ensure a good connection is made between the two mating pins. If the female pin is splayed, the connection will be poor. To check the insertion force of the female connector, identify the correct male pin within WDS probe adaptor kit. Gently insert the adaptor into the female pin and then repeat with the other pins within the connector. If the pin in question feels loose in comparison replace both male and female pins.
Chafing Inspect the harness when in close contact to other objects (i.e. sharp steel brackets). Engine vibration will cause the outer protection to quickly chafe through if the harness is not routed correctly. When performing a repair, ensure that heat resistant tape is used where relevant. Before repairing or replacing any harness, always refer to the electrical wiring harness repair guide, reference publication number JTP 586. When repairing a harness ensure the Jaguar harness repair kit is used. (Part number. 418-S065 and 418-S411.) Always refer to the Technical Hotline if problems are encountered.
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Generic Harness Check • When carrying out any of the tests in the generic harness check, it is imperative that any other
sources that share the harness are taken into consideration when a measurement is taken. • The X-TYPE electrical guide (publication part number – JJM 10 38 20/20) will show all other
sources sharing that harness i.e. splices and sensors. This electrical guide is in JTIS. • Always ensure the digital voltmeter is operating correctly before proceeding. • Always use the WDS probe kit when probing pins within a connector.
Note: Do not insert the Digital Multi Meter (DMM) leads into the connector pins. (Probe adaptor kit part number: 3548-1358-00.)
Continuity test Using a DMM, connect the DMM to the pins at both ends of the circuit that you are testing. Ensure you connect to the correct pin when a large number of pins are used in a connector. (Use WDS Probe adapter kit). Set the DMM to the resistance test or the continuity beeper. The resistance should be between 0 – 10 ohms. If a high resistance or open circuit is found investigate harness for damage.
Short circuit high fault The DMM can be connected to any ground source on the vehicle, but it is preferable to use the battery negative pole. Set the DMM to Volts DC; connect the DMM red probe to the suspect pin of the circuit and the DMM black probe to the battery negative pole. No voltage should be seen, if 4 – 13 volts is seen suspect short circuit high and investigate harness for damage. Always test the circuit with the ignition 'ON' and 'OFF' when trying to identify this fault condition.
Short circuit low fault (to ground) The DMM can be connected to any ground source on the vehicle, but it is preferable to use the battery negative pole. Set the DMM to the resistance test; connect the DMM to the suspect pin of the circuit and the battery negative pole, an infinity reading/open circuit (O/C) should be seen. If a resistance is seen, suspect short circuit low and investigate harness for damage.
Always refer to the Technical Hotline if problems are encountered.